You can use this for an author photo: http://wordpress.org/extend/plugins/user-photo/
And this one might give you multiple images for the author: http://wordpress.org/extend/plugins/sem-author-image/
The final approach is to use a gallery plugin of some kind (NexGen Gallery Perhapse?) and create an album for each author, labeling it “John Doe”. Then, call the gallery in the authors.php file and have it get the proper gallery.